How fast do you think is fast? In 16th form or Triplet form. I'm thinking with some of the hardest of rudiments. In other words, how fast would you expect the top DCI or WGI line to play a packed spree?

around 200 bpm

Well, I'll say about 168 bpm for triplets keeping in mind the hard rudiments. For sixteenths, I don't know. I think it ultimatley depends on what is going to be in it. It could be something like Krackus that just has a bunch of paradiddle stuff in it, or it could be a piece with multiple flams, cheeses, and flam drags and such.